Thread: Question about using an vector iteration loop in C++---Running Mean with three values

I am trying to figure out a general form of this hypothetical example using C++.

I have a vector with any three numbes. I want the first numbers and third numbers in the vectors to not be changed, however for the second number, I would like the number to be average with the first number, the second number, and the third number in the vector which will replace the second number in the final output.

I was wondering if iostream <vector> approach is necessary?

Code:

#include <iostream>
#include<vectors>?
using namespace std;

int main()

{

const int numberofterms=3
double Temperature[numberofterms]={22,24,16.2}
float average

If (first vector number and third vector number are chosen:) THEN

The first vector and the third vector are kept. 

Else The second vector will be replaced by the average.

average = (Temperature[0]+Temperature [1]+Temperature [2])/numberofterms;

}

The displaying part would not be a problem but just the way to write this in C++ I am having a really difficult time to find examples of what I am looking for. Thanks again.!

I see some of the examples using iostream <vector> is that necessary?

let me show you what I am talking about: for loop and vectors - C++ Forum

so how would the if and else loops work in this case @R41D3N?

Code:

#include <iostream>

#include<vectors>?
using namespace std;
 
int main()
 
{
 
const int numberofterms=3
double T[numberofterms]={22,24,16.2}

float average

 
If (T[1], T[3]) 

 

cout<<T[1]<<endl;
cout<<T[2]<<endl;

Else If (which should assume T[2] if I am correct)
T[2] = (T[0]+T[1]+T[2])/3

}

of course System("PAUSE") Return0.

actually I meant for line 24: T[2] = (T[0]+T[1]+T[2])/numberofterms

At least that's my way of "understanding" what you are trying to say. I know its wrong. LOL.

Originally Posted by R41D3N

dont use system() . If you want to hold the display screen, better use cin.get();

the way I suggested it, you wouldnt need an if-else block. Rather than user choosing which 2 to keep as is, let them choose which element to modify into the average. So as to get the index.

Code:

#include <iostream>
 
#include<vectors>?
using namespace std;
  
int main()
  
{
  
const int numberofterms=3
double T[numberofterms]={22,24,16.2}
 
float average
 
  
If (T[1], T[3]) 
 
  
 
cout<<T[1]<<endl;
cout<<T[2]<<endl;
 
Else If 

T[2] = (T[0]+T[1]+T[2])/numberofterms

cin.get()
return 0;


 
}

Would this be a correct approach?